646028628086 has 8 divisors (see below), whose sum is σ = 969064433640. Its totient is φ = 323007150208.

The previous prime is 646028628061. The next prime is 646028628127. The reversal of 646028628086 is 680826820646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3468476 + ... + 3649983.

It is an arithmetic number, because the mean of its divisors is an integer number (121133054205).

Almost surely, 2^646028628086 is an apocalyptic number.

646028628086 is a deficient number, since it is larger than the sum of its proper divisors (323035805554).

646028628086 is a wasteful number, since it uses less digits than its factorization.

646028628086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163838.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 646028628086 in words is "six hundred forty-six billion, twenty-eight million, six hundred twenty-eight thousand, eighty-six".